Apodized surface-corrugated gratings with varying duty cycles

1 June 2000

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters

Vol. 12 (6) , 639-641
https://doi.org/10.1109/68.849069

Abstract

We present the first realization of a Bragg grating apodization based on a concatenation of different duty cycles. The gratings were fabricated in SiON planar waveguides. The reflected signal exhibits a sidelobe suppression better than -20 dB outside a bandwidth of 1.36 nm. At the same time the reflection is stronger than 99.9%, i.e., the resonant light is suppressed better than -30 dB in transmission over 0.22 nm. The gratings are perfectly suited to serve as the wavelength-selective element of a Mach-Zehnder add/drop filter.

Keywords

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